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[PATCH] inotify delete race fix
[linux-2.6/mini2440.git] / drivers / pcmcia / pcmcia_resource.c
blob6f9fdb276402935bec47e407d014dbf30f921dff
1 /*
2 * PCMCIA 16-bit resource management functions
3 *
4 * The initial developer of the original code is David A. Hinds
5 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
6 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
7 *
8 * Copyright (C) 1999 David A. Hinds
9 * Copyright (C) 2004-2005 Dominik Brodowski
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 */
16
17 #include <linux/config.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/interrupt.h>
21 #include <linux/delay.h>
22 #include <linux/pci.h>
23 #include <linux/device.h>
24
25 #define IN_CARD_SERVICES
26 #include <pcmcia/cs_types.h>
27 #include <pcmcia/ss.h>
28 #include <pcmcia/cs.h>
29 #include <pcmcia/bulkmem.h>
30 #include <pcmcia/cistpl.h>
31 #include <pcmcia/cisreg.h>
32 #include <pcmcia/ds.h>
33
34 #include "cs_internal.h"
35 #include "ds_internal.h"
36
37
38 /* Access speed for IO windows */
39 static int io_speed = 0;
40 module_param(io_speed, int, 0444);
41
42
43 #ifdef CONFIG_PCMCIA_PROBE
44 /* mask of IRQs already reserved by other cards, we should avoid using them */
45 static u8 pcmcia_used_irq[NR_IRQS];
46 #endif
47
48
49 #ifdef DEBUG
50 extern int ds_pc_debug;
51 #define cs_socket_name(skt) ((skt)->dev.class_id)
52
53 #define ds_dbg(skt, lvl, fmt, arg...) do { \
54 if (ds_pc_debug >= lvl) \
55 printk(KERN_DEBUG "pcmcia_resource: %s: " fmt, \
56 cs_socket_name(skt) , ## arg); \
57 } while (0)
58 #else
59 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
60 #endif
61
62
63
64 /** alloc_io_space
65 *
66 * Special stuff for managing IO windows, because they are scarce
67 */
68
69 static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
70 ioaddr_t num, u_int lines)
71 {
72 int i;
73 kio_addr_t try, align;
74
75 align = (*base) ? (lines ? 1<<lines : 0) : 1;
76 if (align && (align < num)) {
77 if (*base) {
78 ds_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
79 num, align);
80 align = 0;
81 } else
82 while (align && (align < num)) align <<= 1;
83 }
84 if (*base & ~(align-1)) {
85 ds_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
86 *base, align);
87 align = 0;
88 }
89 if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
90 *base = s->io_offset | (*base & 0x0fff);
91 s->io[0].Attributes = attr;
92 return 0;
93 }
94 /* Check for an already-allocated window that must conflict with
95 * what was asked for. It is a hack because it does not catch all
96 * potential conflicts, just the most obvious ones.
97 */
98 for (i = 0; i < MAX_IO_WIN; i++)
99 if ((s->io[i].NumPorts != 0) &&
100 ((s->io[i].BasePort & (align-1)) == *base))
101 return 1;
102 for (i = 0; i < MAX_IO_WIN; i++) {
103 if (s->io[i].NumPorts == 0) {
104 s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
105 if (s->io[i].res) {
106 s->io[i].Attributes = attr;
107 s->io[i].BasePort = *base = s->io[i].res->start;
108 s->io[i].NumPorts = s->io[i].InUse = num;
109 break;
110 } else
111 return 1;
112 } else if (s->io[i].Attributes != attr)
113 continue;
114 /* Try to extend top of window */
115 try = s->io[i].BasePort + s->io[i].NumPorts;
116 if ((*base == 0) || (*base == try))
117 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
118 s->io[i].res->end + num, s) == 0) {
119 *base = try;
120 s->io[i].NumPorts += num;
121 s->io[i].InUse += num;
122 break;
123 }
124 /* Try to extend bottom of window */
125 try = s->io[i].BasePort - num;
126 if ((*base == 0) || (*base == try))
127 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
128 s->io[i].res->end, s) == 0) {
129 s->io[i].BasePort = *base = try;
130 s->io[i].NumPorts += num;
131 s->io[i].InUse += num;
132 break;
133 }
134 }
135 return (i == MAX_IO_WIN);
136 } /* alloc_io_space */
137
138
139 static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
140 ioaddr_t num)
141 {
142 int i;
143
144 for (i = 0; i < MAX_IO_WIN; i++) {
145 if ((s->io[i].BasePort <= base) &&
146 (s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
147 s->io[i].InUse -= num;
148 /* Free the window if no one else is using it */
149 if (s->io[i].InUse == 0) {
150 s->io[i].NumPorts = 0;
151 release_resource(s->io[i].res);
152 kfree(s->io[i].res);
153 s->io[i].res = NULL;
154 }
155 }
156 }
157 } /* release_io_space */
158
159
160 /** pccard_access_configuration_register
161 *
162 * Access_configuration_register() reads and writes configuration
163 * registers in attribute memory. Memory window 0 is reserved for
164 * this and the tuple reading services.
165 */
166
167 int pccard_access_configuration_register(struct pcmcia_socket *s,
168 unsigned int function,
169 conf_reg_t *reg)
170 {
171 config_t *c;
172 int addr;
173 u_char val;
174
175 if (!s || !s->config)
176 return CS_NO_CARD;
177
178 c = &s->config[function];
179
180 if (c == NULL)
181 return CS_NO_CARD;
182
183 if (!(c->state & CONFIG_LOCKED))
184 return CS_CONFIGURATION_LOCKED;
185
186 addr = (c->ConfigBase + reg->Offset) >> 1;
187
188 switch (reg->Action) {
189 case CS_READ:
190 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
191 reg->Value = val;
192 break;
193 case CS_WRITE:
194 val = reg->Value;
195 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
196 break;
197 default:
198 return CS_BAD_ARGS;
199 break;
200 }
201 return CS_SUCCESS;
202 } /* pccard_access_configuration_register */
203
204 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
205 conf_reg_t *reg)
206 {
207 return pccard_access_configuration_register(p_dev->socket,
208 p_dev->func, reg);
209 }
210 EXPORT_SYMBOL(pcmcia_access_configuration_register);
211
212
213
214 int pccard_get_configuration_info(struct pcmcia_socket *s,
215 unsigned int function,
216 config_info_t *config)
217 {
218 config_t *c;
219
220 if (!(s->state & SOCKET_PRESENT))
221 return CS_NO_CARD;
222
223 config->Function = function;
224
225 #ifdef CONFIG_CARDBUS
226 if (s->state & SOCKET_CARDBUS) {
227 memset(config, 0, sizeof(config_info_t));
228 config->Vcc = s->socket.Vcc;
229 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
230 config->Option = s->cb_dev->subordinate->number;
231 if (s->state & SOCKET_CARDBUS_CONFIG) {
232 config->Attributes = CONF_VALID_CLIENT;
233 config->IntType = INT_CARDBUS;
234 config->AssignedIRQ = s->irq.AssignedIRQ;
235 if (config->AssignedIRQ)
236 config->Attributes |= CONF_ENABLE_IRQ;
237 config->BasePort1 = s->io[0].BasePort;
238 config->NumPorts1 = s->io[0].NumPorts;
239 }
240 return CS_SUCCESS;
241 }
242 #endif
243
244 c = (s->config != NULL) ? &s->config[function] : NULL;
245
246 if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
247 config->Attributes = 0;
248 config->Vcc = s->socket.Vcc;
249 config->Vpp1 = config->Vpp2 = s->socket.Vpp;
250 return CS_SUCCESS;
251 }
252
253 /* !!! This is a hack !!! */
254 memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
255 config->Attributes |= CONF_VALID_CLIENT;
256 config->CardValues = c->CardValues;
257 config->IRQAttributes = c->irq.Attributes;
258 config->AssignedIRQ = s->irq.AssignedIRQ;
259 config->BasePort1 = c->io.BasePort1;
260 config->NumPorts1 = c->io.NumPorts1;
261 config->Attributes1 = c->io.Attributes1;
262 config->BasePort2 = c->io.BasePort2;
263 config->NumPorts2 = c->io.NumPorts2;
264 config->Attributes2 = c->io.Attributes2;
265 config->IOAddrLines = c->io.IOAddrLines;
266
267 return CS_SUCCESS;
268 } /* pccard_get_configuration_info */
269
270 int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
271 config_info_t *config)
272 {
273 return pccard_get_configuration_info(p_dev->socket, p_dev->func,
274 config);
275 }
276 EXPORT_SYMBOL(pcmcia_get_configuration_info);
277
278
279 /** pcmcia_get_window
280 */
281 int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
282 int idx, win_req_t *req)
283 {
284 window_t *win;
285 int w;
286
287 if (!s || !(s->state & SOCKET_PRESENT))
288 return CS_NO_CARD;
289 for (w = idx; w < MAX_WIN; w++)
290 if (s->state & SOCKET_WIN_REQ(w))
291 break;
292 if (w == MAX_WIN)
293 return CS_NO_MORE_ITEMS;
294 win = &s->win[w];
295 req->Base = win->ctl.res->start;
296 req->Size = win->ctl.res->end - win->ctl.res->start + 1;
297 req->AccessSpeed = win->ctl.speed;
298 req->Attributes = 0;
299 if (win->ctl.flags & MAP_ATTRIB)
300 req->Attributes |= WIN_MEMORY_TYPE_AM;
301 if (win->ctl.flags & MAP_ACTIVE)
302 req->Attributes |= WIN_ENABLE;
303 if (win->ctl.flags & MAP_16BIT)
304 req->Attributes |= WIN_DATA_WIDTH_16;
305 if (win->ctl.flags & MAP_USE_WAIT)
306 req->Attributes |= WIN_USE_WAIT;
307 *handle = win;
308 return CS_SUCCESS;
309 } /* pcmcia_get_window */
310 EXPORT_SYMBOL(pcmcia_get_window);
311
312
313 /** pccard_get_status
314 *
315 * Get the current socket state bits. We don't support the latched
316 * SocketState yet: I haven't seen any point for it.
317 */
318
319 int pccard_get_status(struct pcmcia_socket *s, unsigned int function,
320 cs_status_t *status)
321 {
322 config_t *c;
323 int val;
324
325 s->ops->get_status(s, &val);
326 status->CardState = status->SocketState = 0;
327 status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
328 status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
329 status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
330 status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
331 if (s->state & SOCKET_SUSPEND)
332 status->CardState |= CS_EVENT_PM_SUSPEND;
333 if (!(s->state & SOCKET_PRESENT))
334 return CS_NO_CARD;
335
336 c = (s->config != NULL) ? &s->config[function] : NULL;
337 if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
338 (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
339 u_char reg;
340 if (c->Present & PRESENT_PIN_REPLACE) {
341 pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
342 status->CardState |=
343 (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
344 status->CardState |=
345 (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
346 status->CardState |=
347 (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
348 status->CardState |=
349 (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
350 } else {
351 /* No PRR? Then assume we're always ready */
352 status->CardState |= CS_EVENT_READY_CHANGE;
353 }
354 if (c->Present & PRESENT_EXT_STATUS) {
355 pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
356 status->CardState |=
357 (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
358 }
359 return CS_SUCCESS;
360 }
361 status->CardState |=
362 (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
363 status->CardState |=
364 (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
365 status->CardState |=
366 (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
367 status->CardState |=
368 (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
369 return CS_SUCCESS;
370 } /* pccard_get_status */
371
372 int pcmcia_get_status(client_handle_t handle, cs_status_t *status)
373 {
374 struct pcmcia_socket *s;
375 s = SOCKET(handle);
376 return pccard_get_status(s, handle->func, status);
377 }
378 EXPORT_SYMBOL(pcmcia_get_status);
379
380
381
382 /** pcmcia_get_mem_page
383 *
384 * Change the card address of an already open memory window.
385 */
386 int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
387 {
388 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
389 return CS_BAD_HANDLE;
390 req->Page = 0;
391 req->CardOffset = win->ctl.card_start;
392 return CS_SUCCESS;
393 } /* pcmcia_get_mem_page */
394 EXPORT_SYMBOL(pcmcia_get_mem_page);
395
396
397 int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
398 {
399 struct pcmcia_socket *s;
400 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
401 return CS_BAD_HANDLE;
402 if (req->Page != 0)
403 return CS_BAD_PAGE;
404 s = win->sock;
405 win->ctl.card_start = req->CardOffset;
406 if (s->ops->set_mem_map(s, &win->ctl) != 0)
407 return CS_BAD_OFFSET;
408 return CS_SUCCESS;
409 } /* pcmcia_map_mem_page */
410 EXPORT_SYMBOL(pcmcia_map_mem_page);
411
412
413 /** pcmcia_modify_configuration
414 *
415 * Modify a locked socket configuration
416 */
417 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
418 modconf_t *mod)
419 {
420 struct pcmcia_socket *s;
421 config_t *c;
422
423 s = p_dev->socket;
424 c = CONFIG(p_dev);
425 if (!(s->state & SOCKET_PRESENT))
426 return CS_NO_CARD;
427 if (!(c->state & CONFIG_LOCKED))
428 return CS_CONFIGURATION_LOCKED;
429
430 if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
431 if (mod->Attributes & CONF_ENABLE_IRQ) {
432 c->Attributes |= CONF_ENABLE_IRQ;
433 s->socket.io_irq = s->irq.AssignedIRQ;
434 } else {
435 c->Attributes &= ~CONF_ENABLE_IRQ;
436 s->socket.io_irq = 0;
437 }
438 s->ops->set_socket(s, &s->socket);
439 }
440
441 if (mod->Attributes & CONF_VCC_CHANGE_VALID)
442 return CS_BAD_VCC;
443
444 /* We only allow changing Vpp1 and Vpp2 to the same value */
445 if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
446 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
447 if (mod->Vpp1 != mod->Vpp2)
448 return CS_BAD_VPP;
449 c->Vpp1 = c->Vpp2 = s->socket.Vpp = mod->Vpp1;
450 if (s->ops->set_socket(s, &s->socket))
451 return CS_BAD_VPP;
452 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
453 (mod->Attributes & CONF_VPP2_CHANGE_VALID))
454 return CS_BAD_VPP;
455
456 return CS_SUCCESS;
457 } /* modify_configuration */
458 EXPORT_SYMBOL(pcmcia_modify_configuration);
459
460
461 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
462 {
463 pccard_io_map io = { 0, 0, 0, 0, 1 };
464 struct pcmcia_socket *s = p_dev->socket;
465 int i;
466
467 if (!(p_dev->state & CLIENT_CONFIG_LOCKED))
468 return CS_BAD_HANDLE;
469 p_dev->state &= ~CLIENT_CONFIG_LOCKED;
470
471 if (!(p_dev->state & CLIENT_STALE)) {
472 config_t *c = CONFIG(p_dev);
473 if (--(s->lock_count) == 0) {
474 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
475 s->socket.Vpp = 0;
476 s->socket.io_irq = 0;
477 s->ops->set_socket(s, &s->socket);
478 }
479 if (c->state & CONFIG_IO_REQ)
480 for (i = 0; i < MAX_IO_WIN; i++) {
481 if (s->io[i].NumPorts == 0)
482 continue;
483 s->io[i].Config--;
484 if (s->io[i].Config != 0)
485 continue;
486 io.map = i;
487 s->ops->set_io_map(s, &io);
488 }
489 c->state &= ~CONFIG_LOCKED;
490 }
491
492 return CS_SUCCESS;
493 } /* pcmcia_release_configuration */
494 EXPORT_SYMBOL(pcmcia_release_configuration);
495
496
497 /** pcmcia_release_io
498 *
499 * Release_io() releases the I/O ranges allocated by a client. This
500 * may be invoked some time after a card ejection has already dumped
501 * the actual socket configuration, so if the client is "stale", we
502 * don't bother checking the port ranges against the current socket
503 * values.
504 */
505 int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
506 {
507 struct pcmcia_socket *s = p_dev->socket;
508
509 if (!(p_dev->state & CLIENT_IO_REQ))
510 return CS_BAD_HANDLE;
511 p_dev->state &= ~CLIENT_IO_REQ;
512
513 if (!(p_dev->state & CLIENT_STALE)) {
514 config_t *c = CONFIG(p_dev);
515 if (c->state & CONFIG_LOCKED)
516 return CS_CONFIGURATION_LOCKED;
517 if ((c->io.BasePort1 != req->BasePort1) ||
518 (c->io.NumPorts1 != req->NumPorts1) ||
519 (c->io.BasePort2 != req->BasePort2) ||
520 (c->io.NumPorts2 != req->NumPorts2))
521 return CS_BAD_ARGS;
522 c->state &= ~CONFIG_IO_REQ;
523 }
524
525 release_io_space(s, req->BasePort1, req->NumPorts1);
526 if (req->NumPorts2)
527 release_io_space(s, req->BasePort2, req->NumPorts2);
528
529 return CS_SUCCESS;
530 } /* pcmcia_release_io */
531 EXPORT_SYMBOL(pcmcia_release_io);
532
533
534 int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
535 {
536 struct pcmcia_socket *s = p_dev->socket;
537 if (!(p_dev->state & CLIENT_IRQ_REQ))
538 return CS_BAD_HANDLE;
539 p_dev->state &= ~CLIENT_IRQ_REQ;
540
541 if (!(p_dev->state & CLIENT_STALE)) {
542 config_t *c = CONFIG(p_dev);
543 if (c->state & CONFIG_LOCKED)
544 return CS_CONFIGURATION_LOCKED;
545 if (c->irq.Attributes != req->Attributes)
546 return CS_BAD_ATTRIBUTE;
547 if (s->irq.AssignedIRQ != req->AssignedIRQ)
548 return CS_BAD_IRQ;
549 if (--s->irq.Config == 0) {
550 c->state &= ~CONFIG_IRQ_REQ;
551 s->irq.AssignedIRQ = 0;
552 }
553 }
554
555 if (req->Attributes & IRQ_HANDLE_PRESENT) {
556 free_irq(req->AssignedIRQ, req->Instance);
557 }
558
559 #ifdef CONFIG_PCMCIA_PROBE
560 pcmcia_used_irq[req->AssignedIRQ]--;
561 #endif
562
563 return CS_SUCCESS;
564 } /* pcmcia_release_irq */
565 EXPORT_SYMBOL(pcmcia_release_irq);
566
567
568 int pcmcia_release_window(window_handle_t win)
569 {
570 struct pcmcia_socket *s;
571
572 if ((win == NULL) || (win->magic != WINDOW_MAGIC))
573 return CS_BAD_HANDLE;
574 s = win->sock;
575 if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
576 return CS_BAD_HANDLE;
577
578 /* Shut down memory window */
579 win->ctl.flags &= ~MAP_ACTIVE;
580 s->ops->set_mem_map(s, &win->ctl);
581 s->state &= ~SOCKET_WIN_REQ(win->index);
582
583 /* Release system memory */
584 if (win->ctl.res) {
585 release_resource(win->ctl.res);
586 kfree(win->ctl.res);
587 win->ctl.res = NULL;
588 }
589 win->handle->state &= ~CLIENT_WIN_REQ(win->index);
590
591 win->magic = 0;
592
593 return CS_SUCCESS;
594 } /* pcmcia_release_window */
595 EXPORT_SYMBOL(pcmcia_release_window);
596
597
598 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
599 config_req_t *req)
600 {
601 int i;
602 u_int base;
603 struct pcmcia_socket *s = p_dev->socket;
604 config_t *c;
605 pccard_io_map iomap;
606
607 if (!(s->state & SOCKET_PRESENT))
608 return CS_NO_CARD;
609
610 if (req->IntType & INT_CARDBUS)
611 return CS_UNSUPPORTED_MODE;
612 c = CONFIG(p_dev);
613 if (c->state & CONFIG_LOCKED)
614 return CS_CONFIGURATION_LOCKED;
615
616 /* Do power control. We don't allow changes in Vcc. */
617 if (s->socket.Vcc != req->Vcc)
618 return CS_BAD_VCC;
619 if (req->Vpp1 != req->Vpp2)
620 return CS_BAD_VPP;
621 s->socket.Vpp = req->Vpp1;
622 if (s->ops->set_socket(s, &s->socket))
623 return CS_BAD_VPP;
624
625 c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
626
627 /* Pick memory or I/O card, DMA mode, interrupt */
628 c->IntType = req->IntType;
629 c->Attributes = req->Attributes;
630 if (req->IntType & INT_MEMORY_AND_IO)
631 s->socket.flags |= SS_IOCARD;
632 if (req->IntType & INT_ZOOMED_VIDEO)
633 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
634 if (req->Attributes & CONF_ENABLE_DMA)
635 s->socket.flags |= SS_DMA_MODE;
636 if (req->Attributes & CONF_ENABLE_SPKR)
637 s->socket.flags |= SS_SPKR_ENA;
638 if (req->Attributes & CONF_ENABLE_IRQ)
639 s->socket.io_irq = s->irq.AssignedIRQ;
640 else
641 s->socket.io_irq = 0;
642 s->ops->set_socket(s, &s->socket);
643 s->lock_count++;
644
645 /* Set up CIS configuration registers */
646 base = c->ConfigBase = req->ConfigBase;
647 c->Present = c->CardValues = req->Present;
648 if (req->Present & PRESENT_COPY) {
649 c->Copy = req->Copy;
650 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
651 }
652 if (req->Present & PRESENT_OPTION) {
653 if (s->functions == 1) {
654 c->Option = req->ConfigIndex & COR_CONFIG_MASK;
655 } else {
656 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
657 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
658 if (req->Present & PRESENT_IOBASE_0)
659 c->Option |= COR_ADDR_DECODE;
660 }
661 if (c->state & CONFIG_IRQ_REQ)
662 if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
663 c->Option |= COR_LEVEL_REQ;
664 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
665 mdelay(40);
666 }
667 if (req->Present & PRESENT_STATUS) {
668 c->Status = req->Status;
669 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
670 }
671 if (req->Present & PRESENT_PIN_REPLACE) {
672 c->Pin = req->Pin;
673 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
674 }
675 if (req->Present & PRESENT_EXT_STATUS) {
676 c->ExtStatus = req->ExtStatus;
677 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
678 }
679 if (req->Present & PRESENT_IOBASE_0) {
680 u_char b = c->io.BasePort1 & 0xff;
681 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
682 b = (c->io.BasePort1 >> 8) & 0xff;
683 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
684 }
685 if (req->Present & PRESENT_IOSIZE) {
686 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
687 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
688 }
689
690 /* Configure I/O windows */
691 if (c->state & CONFIG_IO_REQ) {
692 iomap.speed = io_speed;
693 for (i = 0; i < MAX_IO_WIN; i++)
694 if (s->io[i].NumPorts != 0) {
695 iomap.map = i;
696 iomap.flags = MAP_ACTIVE;
697 switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
698 case IO_DATA_PATH_WIDTH_16:
699 iomap.flags |= MAP_16BIT; break;
700 case IO_DATA_PATH_WIDTH_AUTO:
701 iomap.flags |= MAP_AUTOSZ; break;
702 default:
703 break;
704 }
705 iomap.start = s->io[i].BasePort;
706 iomap.stop = iomap.start + s->io[i].NumPorts - 1;
707 s->ops->set_io_map(s, &iomap);
708 s->io[i].Config++;
709 }
710 }
711
712 c->state |= CONFIG_LOCKED;
713 p_dev->state |= CLIENT_CONFIG_LOCKED;
714 return CS_SUCCESS;
715 } /* pcmcia_request_configuration */
716 EXPORT_SYMBOL(pcmcia_request_configuration);
717
718
719 /** pcmcia_request_io
720 *
721 * Request_io() reserves ranges of port addresses for a socket.
722 * I have not implemented range sharing or alias addressing.
723 */
724 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
725 {
726 struct pcmcia_socket *s = p_dev->socket;
727 config_t *c;
728
729 if (!(s->state & SOCKET_PRESENT))
730 return CS_NO_CARD;
731
732 if (!req)
733 return CS_UNSUPPORTED_MODE;
734 c = CONFIG(p_dev);
735 if (c->state & CONFIG_LOCKED)
736 return CS_CONFIGURATION_LOCKED;
737 if (c->state & CONFIG_IO_REQ)
738 return CS_IN_USE;
739 if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
740 return CS_BAD_ATTRIBUTE;
741 if ((req->NumPorts2 > 0) &&
742 (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
743 return CS_BAD_ATTRIBUTE;
744
745 if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
746 req->NumPorts1, req->IOAddrLines))
747 return CS_IN_USE;
748
749 if (req->NumPorts2) {
750 if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
751 req->NumPorts2, req->IOAddrLines)) {
752 release_io_space(s, req->BasePort1, req->NumPorts1);
753 return CS_IN_USE;
754 }
755 }
756
757 c->io = *req;
758 c->state |= CONFIG_IO_REQ;
759 p_dev->state |= CLIENT_IO_REQ;
760 return CS_SUCCESS;
761 } /* pcmcia_request_io */
762 EXPORT_SYMBOL(pcmcia_request_io);
763
764
765 /** pcmcia_request_irq
766 *
767 * Request_irq() reserves an irq for this client.
768 *
769 * Also, since Linux only reserves irq's when they are actually
770 * hooked, we don't guarantee that an irq will still be available
771 * when the configuration is locked. Now that I think about it,
772 * there might be a way to fix this using a dummy handler.
773 */
774
775 #ifdef CONFIG_PCMCIA_PROBE
776 static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
777 {
778 return IRQ_NONE;
779 }
780 #endif
781
782 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
783 {
784 struct pcmcia_socket *s = p_dev->socket;
785 config_t *c;
786 int ret = CS_IN_USE, irq = 0;
787
788 if (!(s->state & SOCKET_PRESENT))
789 return CS_NO_CARD;
790 c = CONFIG(p_dev);
791 if (c->state & CONFIG_LOCKED)
792 return CS_CONFIGURATION_LOCKED;
793 if (c->state & CONFIG_IRQ_REQ)
794 return CS_IN_USE;
795
796 #ifdef CONFIG_PCMCIA_PROBE
797 if (s->irq.AssignedIRQ != 0) {
798 /* If the interrupt is already assigned, it must be the same */
799 irq = s->irq.AssignedIRQ;
800 } else {
801 int try;
802 u32 mask = s->irq_mask;
803 void *data = &p_dev->dev.driver; /* something unique to this device */
804
805 for (try = 0; try < 64; try++) {
806 irq = try % 32;
807
808 /* marked as available by driver, and not blocked by userspace? */
809 if (!((mask >> irq) & 1))
810 continue;
811
812 /* avoid an IRQ which is already used by a PCMCIA card */
813 if ((try < 32) && pcmcia_used_irq[irq])
814 continue;
815
816 /* register the correct driver, if possible, of check whether
817 * registering a dummy handle works, i.e. if the IRQ isn't
818 * marked as used by the kernel resource management core */
819 ret = request_irq(irq,
820 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
821 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
822 (s->functions > 1) ||
823 (irq == s->pci_irq)) ? SA_SHIRQ : 0,
824 p_dev->dev.bus_id,
825 (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
826 if (!ret) {
827 if (!(req->Attributes & IRQ_HANDLE_PRESENT))
828 free_irq(irq, data);
829 break;
830 }
831 }
832 }
833 #endif
834 if (ret) {
835 if (!s->pci_irq)
836 return ret;
837 irq = s->pci_irq;
838 }
839
840 if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
841 if (request_irq(irq, req->Handler,
842 ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
843 (s->functions > 1) ||
844 (irq == s->pci_irq)) ? SA_SHIRQ : 0,
845 p_dev->dev.bus_id, req->Instance))
846 return CS_IN_USE;
847 }
848
849 c->irq.Attributes = req->Attributes;
850 s->irq.AssignedIRQ = req->AssignedIRQ = irq;
851 s->irq.Config++;
852
853 c->state |= CONFIG_IRQ_REQ;
854 p_dev->state |= CLIENT_IRQ_REQ;
855
856 #ifdef CONFIG_PCMCIA_PROBE
857 pcmcia_used_irq[irq]++;
858 #endif
859
860 return CS_SUCCESS;
861 } /* pcmcia_request_irq */
862 EXPORT_SYMBOL(pcmcia_request_irq);
863
864
865 /** pcmcia_request_window
866 *
867 * Request_window() establishes a mapping between card memory space
868 * and system memory space.
869 */
870 int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh)
871 {
872 struct pcmcia_socket *s = (*p_dev)->socket;
873 window_t *win;
874 u_long align;
875 int w;
876
877 if (!(s->state & SOCKET_PRESENT))
878 return CS_NO_CARD;
879 if (req->Attributes & (WIN_PAGED | WIN_SHARED))
880 return CS_BAD_ATTRIBUTE;
881
882 /* Window size defaults to smallest available */
883 if (req->Size == 0)
884 req->Size = s->map_size;
885 align = (((s->features & SS_CAP_MEM_ALIGN) ||
886 (req->Attributes & WIN_STRICT_ALIGN)) ?
887 req->Size : s->map_size);
888 if (req->Size & (s->map_size-1))
889 return CS_BAD_SIZE;
890 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
891 (req->Base & (align-1)))
892 return CS_BAD_BASE;
893 if (req->Base)
894 align = 0;
895
896 /* Allocate system memory window */
897 for (w = 0; w < MAX_WIN; w++)
898 if (!(s->state & SOCKET_WIN_REQ(w))) break;
899 if (w == MAX_WIN)
900 return CS_OUT_OF_RESOURCE;
901
902 win = &s->win[w];
903 win->magic = WINDOW_MAGIC;
904 win->index = w;
905 win->handle = *p_dev;
906 win->sock = s;
907
908 if (!(s->features & SS_CAP_STATIC_MAP)) {
909 win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
910 (req->Attributes & WIN_MAP_BELOW_1MB), s);
911 if (!win->ctl.res)
912 return CS_IN_USE;
913 }
914 (*p_dev)->state |= CLIENT_WIN_REQ(w);
915
916 /* Configure the socket controller */
917 win->ctl.map = w+1;
918 win->ctl.flags = 0;
919 win->ctl.speed = req->AccessSpeed;
920 if (req->Attributes & WIN_MEMORY_TYPE)
921 win->ctl.flags |= MAP_ATTRIB;
922 if (req->Attributes & WIN_ENABLE)
923 win->ctl.flags |= MAP_ACTIVE;
924 if (req->Attributes & WIN_DATA_WIDTH_16)
925 win->ctl.flags |= MAP_16BIT;
926 if (req->Attributes & WIN_USE_WAIT)
927 win->ctl.flags |= MAP_USE_WAIT;
928 win->ctl.card_start = 0;
929 if (s->ops->set_mem_map(s, &win->ctl) != 0)
930 return CS_BAD_ARGS;
931 s->state |= SOCKET_WIN_REQ(w);
932
933 /* Return window handle */
934 if (s->features & SS_CAP_STATIC_MAP) {
935 req->Base = win->ctl.static_start;
936 } else {
937 req->Base = win->ctl.res->start;
938 }
939 *wh = win;
940
941 return CS_SUCCESS;
942 } /* pcmcia_request_window */
943 EXPORT_SYMBOL(pcmcia_request_window);
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